引用XML。单人或双人？

问题描述

我听说用单引号来包围XML属性值是一种不好的风格。这是正确的？

我应该总是写：

 <元素attr =value> 
  

或者可以接受：

 < element attr ='value'> 
  

或者使用哪种风格并不重要？

解决方案

两者都是合法的。选择一个并坚持下去。没关系。

从：

  AttValue :: =''（[^<&] | Reference）*' '
 |''（[^&'] | Reference）*'
  

显示两者都是有效的，就像在一个元素，每个属性中混合两种样式一样（尽管我建议在任何单个文档/一组文档中保持一致。）

I've heard that using single quotes to surround XML attribute values is a "bad style". Is this correct?

Should I always write:

<element attr="value">

Or is it acceptable to write:

<element attr='value'>

Or does it not matter which style I use?

解决方案

Both are legal. Choose one and stick with it. It doesn't matter.

From the spec:

AttValue       ::=      '"' ([^<&"] | Reference)* '"'
                     |  "'" ([^<&'] | Reference)* "'"

Showing that both are valid, as is mixing the two styles within an element, per attribute (though I suggest being consistent within any single document/set of documents).

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